CN112571967B - Liquid ejecting head and liquid ejecting apparatus - Google Patents

Abstract

The present disclosure provides a liquid ejecting head and a liquid ejecting apparatus. The liquid ejecting head includes: a nozzle plate provided with nozzles for ejecting liquid in a first direction; a first flow path member which is disposed on a second direction side opposite to the first direction with respect to the nozzle plate, and which is provided with a flow path for supplying liquid to the nozzle; a liquid introduction portion which is disposed on the second direction side with respect to the first flow path member and introduces liquid from the outside to the flow path, the first flow path member having: a surrounding wall which is provided upright on a surface on the second direction side and surrounds the liquid introduction portion; and a discharge passage for discharging the liquid from the surface to the outside of the first flow path member, wherein a first opening of the discharge passage opening in the second direction is provided on the surface, and a distance between a first wall portion of the surrounding wall, which is arranged along a third direction orthogonal to the first direction, and an edge of the first opening is 1/2 or less of a length of a largest line segment that can be arranged in the first opening.

Description

Liquid ejection head and liquid ejection device

technical field

The present disclosure relates to a liquid ejection head and a liquid ejection device.

Background technique

Conventionally, there is an ink head unit that includes an ink discharge port in a range surrounded by a standing wall of a channel member forming a part of a liquid channel (Patent Document 1). In this ink head unit, when ink leaks from the connection between the ink cartridge and the ink head unit, the ink is discharged from the ink discharge port to the outside of the ink head unit.

However, in the technique of Patent Document 1, sufficient consideration is not given to the positional relationship between the standing wall and the ink discharge port. Therefore, when ink leakage occurs, or when the ink head unit is tilted thereafter, the ink is caught at the lower part of the corner where the standing wall of the flow path member connects with the bottom surface, so that Ink was not discharged from the ink discharge port provided on the bottom surface. After that, if the ink leaks further, the ink may leak to the outside beyond the standing wall and adhere to the circuit board or the connector to cause a short circuit.

Patent Document 1: Japanese Patent Laid-Open No. 2013-233722

Contents of the invention

According to one embodiment of the present disclosure, there is provided a liquid ejection head. In this liquid jet head, a nozzle plate is provided with a plurality of nozzles for jetting liquid in a first direction; a first flow channel member is arranged opposite to the first direction with respect to the nozzle plate. direction, that is, the second direction side, and a flow channel for supplying liquid to the nozzle is provided inside; a liquid introduction part is arranged on the second direction side relative to the first flow channel member, and is arranged from the The liquid is introduced into the flow path from the outside of the liquid jet head, and the first flow path member has a surrounding wall that is drawn toward the second direction from the surface of the first flow path member on the second direction side. set upright, and surround the liquid introduction part; a discharge channel, which discharges liquid from the surface to the outside of the first flow channel member, and a first opening is provided on the surface, and the first opening is the A part of the discharge passage is opened toward the second direction, the surrounding wall has a first wall portion arranged along a third direction perpendicular to the first direction, the The minimum distance between the edge of the first opening and the first wall is 1/2 or less of the length of the largest line segment that can be arranged in the first opening.

Description of drawings

FIG. 1 is an explanatory diagram showing a schematic configuration of a liquid ejection device 100 including a liquid ejection head 200 according to an embodiment of the present disclosure.

FIG. 2 is an exploded perspective view of the liquid jet head 200 showing components of the holder 210 .

FIG. 3 is an exploded perspective view of the liquid ejection head 200 showing the first sealing member 220 , the circuit board 230 , the actuator unit 240 , and the housing 250 .

FIG. 4 is an exploded perspective view of the liquid jet head 200 showing the vibrating plate 260 , the flow path forming member 270 , the nozzle plate 280 and the cover 290 .

FIG. 5 is a top view of the main body 215 of the bracket 210 along the first direction D1.

FIG. 6 is a plan view showing a state where the filter 213 and the packing 211 overlap the main body portion 215 of the holder 210 .

FIG. 7 is a plan view showing a state in which the mounting portion 214 is further overlapped with the subassembly of FIG. 6 .

8 is a plan view showing a state in which circuit board 230 , actuator unit 240 , case 250 , vibration plate 260 , flow path forming member 270 , nozzle plate 280 , and cover 290 overlap.

9 is a plan view showing a state where holder 210 , circuit board 230 , actuator unit 240 , case 250 , vibration plate 260 , flow path forming member 270 , nozzle plate 280 , and cover 290 overlap.

FIG. 10 is a plan view showing the liquid jet head 200 mounted on the carriage 116 viewed along the second direction D2.

FIG. 11 is an explanatory view showing the positional relationship between the first opening Op11 of the discharge passage Ex1 and the first wall W11 on the main body portion 215 .

FIG. 12 is a view showing a part of the cavity Cv of the mold when the structures of the first opening Op11 and the first wall W11 of the discharge passage Ex1 on the main body portion 215 are cast by the mold.

FIG. 13 is an explanatory diagram showing the positional relationship between the first opening Op21 of the discharge passage Ex2 and the first wall W21 on the main body portion 215 .

FIG. 14 is an explanatory view showing the positional relationship between the first opening Op31 of the discharge passage Ex3 and the first wall W31 on the main body portion 215 .

FIG. 15 is an explanatory view showing the positional relationship between the first opening Op41 of the discharge passage Ex4 and the first wall W41 on the main body portion 215 .

FIG. 16 is an explanatory view showing the positional relationship between the first opening Op51 of the discharge passage Ex5 and the first wall W51 on the main body portion 215 .

FIG. 17 is an explanatory diagram showing a schematic configuration of a liquid ejecting device 100 a including a liquid ejecting head 200 a in the second embodiment.

Fig. 18 is a cross-sectional view showing the detailed structure of the pressure regulating valve.

FIG. 19 is a cross-sectional view showing the detailed structure of the damper 170 .

FIG. 20 is a cross-sectional view showing the structures of the hose 160 , the ink supply needle 205 , and the holder 210 a in another embodiment 2 of the second embodiment.

Detailed ways

A. The first embodiment:

A1. The structure of the liquid injection device:

FIG. 1 is an explanatory diagram showing a schematic configuration of a liquid ejection device 100 including a liquid ejection head 200 according to an embodiment of the present disclosure. The liquid ejecting device 100 is an inkjet printer that ejects ink. The liquid ejection device 100 receives image data from a computer as a liquid ejection control device not shown in FIG. 1 . The liquid ejecting device 100 converts the image data into print data indicating on and off (ON, OFF) of dots on the printing medium P. FIG. The liquid ejecting device 100 ejects ink on the printing medium P based on printing data, forms dots at various positions on the printing medium P, and prints an image on the printing medium P.

The liquid ejecting device 100 includes a liquid ejecting head 200 , a carriage 116 , ten ink cartridges 117 , a carriage motor 118 , a conveyance motor 119 , a drive belt 114 , a flexible flat cable 113 , a platen 115 , a control unit 110 , and a case 112 .

The liquid jet head 200 is mounted on the carriage 116 . The liquid jet head 200 is electrically connected to the control unit 110 via the flexible flat cable 113 . The liquid ejection head 200 includes a plurality of nozzles 282 that eject ink onto the surface facing the printing medium P. As shown in FIG. A plurality of nozzles 282 constitute ten nozzle rows 281 . The ink supplied from the ink cartridge 117 to the liquid ejection head 200 is ejected onto the printing medium P from the nozzle 282 in the form of liquid droplets.

The ink cartridge 117 stores ink which is a liquid supplied to the liquid ejection head 200 . The ten ink cartridges 117 respectively store inks of different colors. The ten ink cartridges 117 are mounted on the carriage 116 .

The carriage 116 holds and moves the liquid jet head 200 . The carriage 116 is mounted on a carriage guide not shown in FIG. 1 . The carriage 116 can reciprocate in the main scanning direction X along the carriage guide. The carriage 116 is connected to a carriage motor 118 via a drive belt 114 . The carriage 116 reciprocates along the main scanning direction X along with the rotation of the carriage motor 118 .

In FIG. 1 , X-axis, Y-axis, and Z-axis that are orthogonal to each other are shown. The Z axis is an axis that coincides with the upper direction in the vertical direction. The X axis is an axis along the main scanning direction X. The Y axis is an axis in a direction perpendicular to the X axis and the Z axis. The Y-axis direction is also referred to as "sub-scanning direction Y". Among these directions, the direction indicated by the arrow mark is indicated by "+", and the direction opposite to the direction indicated by the arrow mark is indicated by "-". In this specification, the −Z direction is also referred to as the first direction D1, the +Z direction is referred to as the second direction D2, the +X direction is referred to as the third direction D3, and the +Y direction is referred to as the fourth direction D4. The X-axis, Y-axis, and Z-axis shown in the figures following FIG. 2 coincide with the X-axis, Y-axis, and Z-axis shown in FIG. 1 .

The conveyance motor 119 is a motor for conveying the printing medium P onto which the ink ejected from the nozzle 282 lands. The conveyance motor 119 operates according to a control signal from the control unit 110 . The printing medium P is conveyed along the sub-scanning direction Y by transmitting the power of the conveyance motor 119 to the rollers of the platen 115 .

The platen 115 supports the printing medium P to be conveyed. On the platen 115 , an ink absorbing portion Ab1 is provided along the main scanning direction X. As shown in FIG. The ink absorbing portion Ab1 accommodates the porous member, and is opened in the Z direction. The ink absorbing portion Ab1 will be described later.

The case 112 accommodates the liquid jet head 200 , the carriage 116 , the ten ink cartridges 117 , the carriage motor 118 , the conveyance motor 119 , the drive belt 114 , the flexible flat cable 113 , and the platen 115 . In FIG. 1 , a part of the housing 112 is not shown in order to make the inner structure of the housing 112 visible. In FIG. 1 , the control unit 110 is arranged outside the housing 112 . However, the case 112 may also be configured to house the control unit 110 .

The control section 110 has processing circuits such as one or more CPUs (Central Processing Unit, central processing unit), FPGA (Field Programmable Gate Array, Field Programmable Gate Array), and storage circuits such as semiconductor memories, and conveys motors 119 And the carriage 116 is controlled. Specifically, when the generation of print data is completed, the control unit 110 drives the conveyance motor 119 to convey the printing medium P to the printing start position in the sub-scanning direction Y. The control unit 110 drives the carriage motor 118 to move the carriage 116 to the printing start position in the main scanning direction X. The control unit 110 alternately executes control for ejecting ink from the liquid ejection head 200 to the printing medium P while moving the carriage 116 in the main scanning direction X, and controlling for printing in the sub-scanning direction that is the printing direction, according to the print data. Control of the conveying motor 119 that conveys the printing medium P on Y. As a result, an image is printed on the printing medium P. As shown in FIG.

A2. The structure of the liquid ejection head:

2 , 3 and 4 are exploded perspective views showing a schematic configuration of the liquid jet head 200 . The liquid jet head 200 sequentially includes a holder 210, a first sealing member 220, a circuit board 230, an actuator unit 240, a housing 250, a vibrating plate 260, a flow path forming member 270, a nozzle plate 280, and Cover 290. The liquid jet head 200 is constructed by laminating these respective structural members and combining them with four screws 293 , 294 , 295 , and 296 .

FIG. 2 is an exploded perspective view of the liquid jet head 200 showing components of the holder 210 . The holder 210 holds the ink cartridge 117 while holding the carriage 116 (see FIG. 1 ). The holder 210 allows the ink supplied from the ink cartridge 117 to flow into the case 250 (see FIG. 3 ). The holder 210 includes an attachment portion 214 , a filter 213 , a packing 211 , and a main body portion 215 .

The mounting portion 214 is a member to which the ink cartridge 117 is mounted. The attachment portion 214 includes ten ink supply needles 205 . One ink supply needle 205 is inserted into one ink cartridge 117 that supplies ink to the liquid ejection head 200 . The ink supply needle 205 has a part of the second flow path 219 inside. The ink supply needle 205 functions as a liquid introduction portion for introducing ink from the ink cartridge 117 to the liquid jet head 200 .

The mounting portion 214 is made of a polymer alloy of polyphenylene ether and other resins. The contact angle of each ink contained in the ink cartridge 117 on the surface of the mounting portion 214 is 20° or less. That is, the surface of the mounting portion 214 has high wettability with respect to ink.

The filter 213 is a member that removes air bubbles and foreign matter contained in the ink supplied from the ink cartridge 117 . The filter 213 is arranged to block the second flow path 219 between the mounting portion 214 and the packing 211 . The filter 213 has a disk shape. As the filter 213 , a sheet-like material in which many fine pores are formed by finely weaving metal or resin fibers, or a plate-shaped member in which many fine pores penetrate metal or resin can be used.

The packing 211 is a plate-shaped member and has ten through holes penetrating in the Z direction. The packing 211 liquid-tightly seals between the attachment part 214 and the main body part 215 . The ink flows from the second flow path 219 in the ink supply needle 205 of the mounting portion 214 to the second flow path 219 in the main body portion 215 through the through hole provided in the seal member 211 .

A part of the second flow path 219 that supplies ink to the nozzle 282 is provided inside the main body portion 215 . The second flow path 219 inside the main body portion 215 is constituted by a groove portion extending in the horizontal direction and a through hole connected to the groove portion. When the main body part 215 is seen along the first direction D1, the main body part 215 is a substantially rectangular shape with the third direction D3 being the long side direction and the fourth direction D4 being the short side direction. The main body portion 215 is made of a polymer alloy of polyphenylene ether and other resins. The contact angle between the surface of the main body portion 215 and each ink stored in the ink cartridge 117 is 20° or less. That is, the wettability of the surface of the main body portion 215 with respect to ink is high.

The main body portion 215 includes a bottom plate surface Ts and a surrounding wall W10. The bottom surface Ts is a surface on the second direction D2 side of the main body portion 215 . The floor surface Ts is also denoted "surface Ts". The bottom surface Ts is a flat surface. The surrounding wall W10 is a wall portion erected in the second direction D2 from the bottom plate surface Ts. When the mounting part 214 , the filter 213 , the seal 211 , and the main body part 215 are combined, the surrounding wall W10 surrounds the ink supply needle 205 . The main body portion 215 also has a discharge channel Ex1 that discharges ink from the bottom plate surface Ts to the outside of the main body portion 215 . The discharge passage Ex1 is a through hole that linearly penetrates the main body portion 215 along the first direction D1. The outlet channel Ex1 is not shown in FIG. 2 . The detailed configuration of the main body portion 215 will be described later.

In the holder 210 , the second flow path 219 in the ink supply needle 205 allows the ink supplied from the ink cartridge 117 to flow into the holder 210 . The ink is filtered at the filter 213 , passes through the through hole of the seal 211 , and reaches the second flow channel 219 in the main body 215 . The second flow path 219 in the main body 215 distributes the ink to the ink introduction port 221 of the first sealing member 220 (see FIG. 3 ).

FIG. 3 is an exploded perspective view of the liquid ejection head 200 showing the first sealing member 220 , the circuit substrate 230 , the actuator unit 240 and the housing 250 . The first sealing member 220 is disposed between the bracket 210 (see FIG. 2 ) and the case 250 , and seals between the bracket 210 and the case 250 in a liquid-tight manner. The first sealing member 220 is a substantially rectangular plate-shaped member that is long and narrow in the X direction. The first sealing member 220 is constituted by an elastic member such as rubber or elastic body, for example.

Ten ink introduction ports 221 are formed in the first sealing member 220 . The ink inlet 221 is a through hole penetrating the first sealing member 220 in the Z direction. The ink flows from the second flow path 219 (see FIG. 2 ) of the main body 215 of the holder 210 to the first flow path 253 in the housing 250 via the ink introduction port 221 of the first sealing member 220 .

The housing 250 is provided between the main body 215 of the bracket 210, the vibrating plate 260, and the flow path forming member 270 (see FIG. 4 ). The housing 250 distributes the ink received from the holder 210 to the flow path forming part 270 . Furthermore, the case 250 holds the circuit board 230 and the actuator unit 240 between the bracket 210 . Case 250 is formed of, for example, synthetic resin such as polypropylene.

The housing 250 has five storage spaces 255 and ten flow pipes FP. The storage spaces 255 are each formed by recesses provided along the Y direction and opening to the second direction D2. The storage space 255 houses the actuator unit 240 . Five storage spaces 255 are arranged side by side in the X direction.

The flow pipe FP is a cylindrical member protruding in the second direction D2 from the bottom surface of the housing 250 . When the housing 250 is viewed along the first direction D1, the ten flow channel pipes FP are respectively arranged at positions not overlapping the five storage spaces 255 . The flow pipe FP communicates the ink inlet 221 of the first sealing member 220 with the ink inlet 261 of the vibrating plate 260 . The flow passage pipe FP functions as the first flow passage 253 through which the ink supplied from the ink cartridge 117 flows into the ink inlet 261 .

The circuit board 230 is a substantially rectangular plate-shaped member that is long and narrow in the X direction. More specifically, when the circuit board 230 is viewed along the first direction D1, the outer shape of the circuit board 230 is approximately the same as that in which the third direction D3 is defined as the long side direction and the fourth direction D4 is defined as the short side direction. rectangle. The circuit board 230 is arranged between the bracket 210 and the case 250 . The circuit board 230 is adjacent to the first sealing member 220 on the first direction D1 side. The circuit board 230 is fixed to the surface of the housing 250 on the second direction D2 side by an adhesive.

The circuit board 230 includes a circuit for driving the liquid jet head 200 . More specifically, the circuit board 230 is an electronic board on which wiring for driving the piezoelectric body 243 included in the actuator unit 240 , circuit elements, and the like are integrated. The circuit board 230 has ten first through holes 231 , ten sets of connection terminals Ct, and two connector units Cn.

The first through hole 231 is a through hole penetrating the circuit board 230 in the Z direction. When the circuit board 230 is viewed along the second direction D2 , the first through holes 231 are respectively provided at positions overlapping with the ink introduction ports 221 of the first sealing member 220 . When viewing the circuit substrate 230 along the first direction D1 , the first through hole 231 is disposed at a position overlapping with the flow pipe FP of the casing 250 . When the first sealing member 220, the circuit board 230, the actuator unit 240, and the housing 250 are combined, the flow pipe FP of the housing 250 penetrates the first through hole 231 of the circuit board 230, and is connected with the first seal. The ink inlet 221 of the member 220 is connected.

A pair of connector units Cn, Cn are provided at both ends of the circuit substrate 230 in the third direction D3. By setting it as such a structure, the distance from the connector unit Cn to each circuit on the circuit board 230 can be shortened as a whole. One connector unit Cn includes one connector on one surface and the other surface of the circuit board 230 . That is, the circuit board 230 includes four connectors.

A flexible flat cable 113 is connected to the connector unit Cn. The circuit board 230 is electrically connected to the control unit 110 (see FIG. 1 ) via the flexible flat cable 113 .

The actuator unit 240 includes a COF (Chip on Film, chip on film) substrate 242 , a fixing plate 241 , and a piezoelectric body 243 . The fixing plate 241 is fixed to a wall surface of the casing 250 that defines the storage space 255 . A drive circuit for driving the piezoelectric body 243 is provided on the COF substrate 242 . The end portion of the COF substrate 242 on the first direction D1 side is connected to the piezoelectric body 243 . The end portion of the COF substrate 242 on the second direction D2 side is inserted into the opening 233 of the circuit substrate 230 and connected to the connection terminal Ct of the circuit substrate 230 .

The piezoelectric body 243 constitutes a passive element utilizing the piezoelectric effect, that is, a piezoelectric element. The piezoelectric element is driven based on a drive signal from the control unit 110 . The piezoelectric body 243 is fixed to the support plate of the vibrating plate 260 so that the end portion on the first direction D1 side becomes a free end. The piezoelectric body 243 is fixed to the end portion of the fixing plate 241 on the first direction D1 side so that the end portion on the second direction D2 side becomes a fixed end.

FIG. 4 is an exploded perspective view of the liquid ejection head 200 showing the vibrating plate 260 , the flow path forming member 270 , the nozzle plate 280 and the cover 290 . The vibrating plate 260 is a substantially rectangular plate-shaped member that is long and narrow in the X direction. Vibration plate 260 is provided between housing 250 and flow channel forming member 270 . The vibrating plate 260 functions as a wall surface that closes the opening provided on the surface of the flow channel forming member 270 on the second direction D2 side. The vibration plate 260 is elastically deformed by the piezoelectric body 243 of the actuator unit 240 . As a result, ink is ejected from the pressure chamber of the flow path forming member 270 via the nozzle 282 .

Vibrating plate 260 is formed by laminating, for example, an elastic film made of an elastic member such as a resin film, and a support plate made of a metal material such as stainless steel (SUS) for supporting the elastic film. The elastic film is supported by being joined to the surface on the −Z direction side of the support plate.

The vibrating plate 260 has an ink inlet 261 . The ink introduction port 261 is a through hole penetrating through the vibrating plate 260 in the Z direction. The ink introduction port 261 communicates with the flow channel pipe FP of the housing 250 and the third flow channel 273 of the flow channel forming member 270 , so that the ink supplied from the ink cartridge 117 flows into the third flow channel 273 .

Flow channel forming member 270 is a plate-shaped member having an outer shape matching the outer shape of vibrating plate 260 . The flow path forming member 270 is provided between the housing 250 (see FIG. 3 ) and the nozzle plate 280 . The flow path forming member 270 includes a third flow path 273 . Although not shown in the figure, the flow channel forming member 270 includes a pressure chamber. In this embodiment, the channel forming member 270 is formed of, for example, silicon (Si). In addition, the flow path forming member 270 may have a structure in which a plurality of substrates are laminated.

The nozzle plate 280 is a thin plate-shaped member having an outer shape matching the outer shapes of the vibrating plate 260 and the flow path forming member 270 . The nozzle plate 280 is disposed on the first direction D1 side of the flow path forming member 270 . The nozzle plate 280 includes a plurality of nozzles 282 for spraying liquid in the first direction D1. More specifically, the nozzle plate 280 includes ten nozzle rows 281 each composed of a plurality of nozzles 282 arranged along the Y direction. Ten nozzle rows 281 are arranged side by side in the X direction.

The nozzle 282 is a through hole penetrating through the nozzle plate 280 in the Z direction. The ink in the pressure chamber of the flow path forming member 270 is ejected to the printing medium P through the nozzle 282 . Each nozzle 282 is provided at a position corresponding to the pressure chamber of the flow path forming member 270 . The nozzle plate 280 functions as a wall surface that closes the openings provided on the surface of the flow path forming member 270 in the first direction D1 at the portion where the nozzle 282 is not provided. The nozzle plate 280 is formed of, for example, stainless steel (SUS), silicon (Si), or the like.

Case 250 , vibrating plate 260 , flow path forming member 270 , and nozzle plate 280 are each fixed with an adhesive (see FIGS. 3 and 4 ). Specifically, the surface of the nozzle plate 280 on the second direction D2 side and the flow channel forming member 270 on the first direction D1 side are bonded together with an adhesive. In addition, the surface of the flow channel forming member 270 on the second direction D2 side and the surface of the vibration plate 260 on the first direction D1 side are bonded together with an adhesive. The surface of the vibrating plate 260 on the second direction D2 side and the surface of the housing 250 on the first direction D1 side are bonded together with an adhesive. Adhesive may also be applied to each of the structural components 250 , 260 , 270 and 280 .

The cover 290 is a frame housing the vibrating plate 260 , the flow path forming member 270 , and the nozzle plate 280 . Cover 290 is provided with an opening for exposing the surface of nozzle plate 280 on the first direction D1 side when vibrating plate 260 , flow path forming member 270 , and nozzle plate 280 are housed in cover 290 . Four through holes 291 into which screws 293 , 294 , 295 , and 296 are inserted are provided in cover 290 . Cover 290 is fixed to bracket 210 with screws 293 , 294 , 295 , and 296 with housing 250 and circuit board 230 interposed therebetween.

The above-mentioned components of the liquid jet head 200 (see FIGS. 2 to 4 ) are laminated and connected by four screws 293 , 294 , 295 , and 296 . The four screws 293 , 294 , 295 , and 296 are constituted by full screws, for example. In the present embodiment, a "full screw" refers to a screw in which notches are provided on the side surfaces of parts other than the head of the screw. Screws 293, 294, 295, and 296 are inserted into threaded holes formed in advance on the housing 250, and screwed to form thread grooves on the main body portion 215 of the bracket 210, so that the bracket 210, the housing 250 Combined with cover 290. Specifically, the base surfaces of the screws 293 , 294 , 295 , and 296 that bear the load generated by the connection abut against the periphery of the through hole 291 of the cover 290 and sandwich the case 250 between the cover 290 and the bracket 210 . way, to fix the bracket 210, the housing 250 and the cover 290.

A3. The structure of the discharge channel on the main body:

FIG. 5 is a top view of the main body portion 215 (see FIG. 2 ) of the bracket 210 viewed along the first direction D1. The surrounding wall W10 of the main body portion 215 includes a plurality of wall portions W11 to W18. More specifically, the surrounding wall W10 includes a first wall portion W11, a second wall portion W12, a third wall portion W13, a fourth wall portion W14, a fifth wall portion W15, a sixth wall portion W16, and a seventh wall portion W17. and the eighth wall portion W18.

The first wall portion W11 is arranged along the third direction D3. The second wall portion W12 faces the first wall portion W11 across the second flow path 219 and is arranged along the third direction D3. The third wall portion W13 is arranged along the fourth direction D4. The fourth wall portion W14 faces the third wall portion W13 across the second flow path 219 and is arranged along the fourth direction D4. These first wall portion W11 to fourth wall portion W14 constitute the four sides of the substantially rectangular outer shape of the main body portion 215 when the main body portion 215 is viewed along the first direction D1.

The fifth wall portion W15 is a wall portion connecting the first wall portion W11 and the third wall portion W13. The fifth wall portion W15 is located on the −Y direction side with respect to the first wall portion W11 . The fifth wall portion W15 is located on the −X direction side with respect to the third wall portion W13 . The sixth wall portion W16 is a wall portion connecting the second wall portion W12 and the fourth wall portion W14. The sixth wall portion W16 is located on the +Y direction side with respect to the second wall portion W12 . The sixth wall portion W16 is located on the +X direction side with respect to the fourth wall portion W14 .

The seventh wall portion W17 is a wall portion connecting the second wall portion W12 and the third wall portion W13. The seventh wall portion W17 is located on the +Y direction side with respect to the second wall portion W12 . The seventh wall portion W17 is located on the −X direction side with respect to the third wall portion W13 . The eighth wall W18 is a wall connecting the first wall W11 and the fourth wall W14 . The eighth wall portion W18 is located on the −Y direction side with respect to the first wall portion W11 . The eighth wall portion W18 is located on the +X direction side with respect to the fourth wall portion W14 .

As described above, among the plurality of wall portions W11 to W18 constituting the surrounding wall W10 , wall portions provided at mutually different positions in the fourth direction D4 are included. The first wall portion W11 is a wall portion located on the outermost side of the plurality of wall portions W11 to W18 in the fourth direction D4, that is, on the fourth direction D4 side.

On the surface Ts of the main body portion 215 is provided a first opening Op11 which is a part of the discharge passage Ex1 and opens toward the second direction D2 (see the lower central portion in FIG. 5 ). When the main body part 215 is viewed along the first direction D1, the first opening Op11 is provided in the vicinity of the first wall part W11. Within a predetermined range including the first opening Op11, the inner surface of the first wall portion W11 is a plane. Since the bottom plate surface Ts is also a plane, the connection part of the 1st wall part W11 and the bottom plate surface Ts is linear. In a cross section parallel to the ZY plane, the connecting portion between the first wall portion W11 and the bottom plate surface Ts constitutes a concave corner portion in which two planes are connected at 90°. The connecting portion between the first wall portion W11 and the bottom plate surface Ts is also referred to as a “boundary” between the first wall portion W11 and the bottom plate surface Ts.

With such a configuration, the liquid existing at the connection portion between the surface Ts on the second direction D2 side of the main body portion 215 and the first wall portion W11 and the ink moving toward the connection portion can be moved by capillary force. It is held at the boundary between the surface Ts and the first wall portion W11 and guided to the discharge passage Ex1 so as to be discharged to a predetermined location outside the main body portion 215 through the discharge passage Ex1. Therefore, it is possible to reduce the possibility that the ink leaked from the connection portion between the ink cartridge 117 and the ink supply needle 205 of the holder 210 leaks outside the surrounding wall W10 to cause trouble.

Moreover, the 1st wall part W11 is the wall part located in the outermost side among the several wall parts W11-W18 in the 4th direction D4, ie, the 4th direction D4 side. Therefore, when the liquid jet head 200 is tilted in a direction including a rotation component centered on a direction parallel to the third direction D3, the liquid flows toward the surface Ts of the main body portion 215 and the surface Ts of the first wall portion W11. Connect parts and flow. As a result, according to the main body portion 215 of the present embodiment, such ink can be introduced into the first opening Op11 to be discharged to the outside of the main body portion 215 .

FIG. 6 is a plan view showing a state where the filter 213 and the packing 211 overlap the main body portion 215 of the holder 210 (see FIG. 2 ). When the main body 215, the filter 213, and the packing 211 are stacked, the first opening Op11 is provided at a position not overlapping the filter 213 and the packing 211 (see the lower central portion in FIG. 6 ).

FIG. 7 is a plan view showing a state where the mounting portion 214 is further overlapped with the subassembly shown in FIG. 6 (see FIG. 2 ). When the mounting portion 214 , the main body portion 215 , the filter 213 , and the packing 211 are stacked, the first opening Op11 is provided at a position not overlapping the mounting portion 214 (see the lower central portion in FIG. 7 ).

When the main body portion 215 and the mounting portion 214 are observed along the first direction D1, the minimum distance C12 between the second wall portion W12 of the main body portion 215 and the mounting portion 214, the minimum distance C12 between the third wall portion W13 and the mounting portion 214 The minimum distance C13 between the fourth wall part W14 and the installation part 214 is both 0.5 mm. When viewing the main body portion 215 and the mounting portion 214 along the first direction D1, the minimum distance C11 between the edge of the first opening Op11 and the mounting portion 214 is 10 mm. The minimum distance between the main body portion 215 and the mounting portion 214 in the second direction D2 is 0.5 mm.

With such a configuration, when the liquid jet head 200 is inclined in a direction in which the second wall W12 is lower than the first wall W11, the ink is held between the second wall W12 and the first wall W11. Between the mounting parts 214 (see C12 in FIG. 7 ). When the liquid ejection head 200 is tilted in a direction in which the third wall W13 is lower than the fourth wall W14, the ink is held between the third wall W13 and the mounting portion 214 (see FIG. 7 of C13). When the liquid jet head 200 is tilted so that the fourth wall W14 is lower than the third wall W13, the ink is held between the fourth wall W14 and the mounting portion 214 (see C14 of Figure 7). As a result, in those cases, the possibility of ink adhering to other components can be reduced.

On the other hand, when the liquid ejection head 200 is tilted so that the first wall W11 is lower than the second wall W12, the liquid is not held on the first wall W11 and attached to it. 214, but can be discharged from the first opening Op11 of the bottom surface Ts to a predetermined position outside.

8 is a plan view showing a state where circuit board 230, actuator unit 240, case 250, vibrating plate 260, flow channel forming member 270, nozzle plate 280, and cover 290 overlap (see FIGS. 3 and 4). In the assembled state, the flow pipe FP of the housing 250 penetrates the first through hole 231 of the circuit board 230 .

9 is a plan view showing a state in which a holder 210, a circuit board 230, an actuator unit 240, a casing 250, a vibrating plate 260, a flow path forming member 270, a nozzle plate 280, and a cover 290 are stacked on a carriage 116 (see FIG. 2～Figure 4). In FIG. 9 , since the circuit board 230 is located behind the mounting portion 214 , it is not shown. On the other hand, in FIG. 9 , the first wall part W11 to the fourth wall part W14 constituting the substantially rectangular outer shape of the main body part 215 are shown around the attachment part 214 . That is, the outer shape of the main body portion 215 is substantially rectangular including the circuit board 230 .

FIG. 10 is a plan view showing the liquid jet head 200 mounted on the carriage 116 viewed along the second direction D2. In FIG. 10 , ten nozzle rows 281 are shown on the surface of the nozzle plate 280 surrounded by the cover 290 on the first direction D1 side.

In FIG. 10 , an opening Op12 at the end opposite to the first opening Op11 (see FIG. 5 ) in the exhaust passage Ex1 of the main body portion 215 of the holder 210 is shown. On the bottom surface of the carriage 116, a second opening Opc communicating with the opening Op12 of the discharge passage Ex1 is provided. With such a configuration, the ink can pass through the second opening Opc and be discharged to the outside of the carriage 116 .

The opening Op12 is provided in the main body 215 at a position not overlapping the circuit board 230 when the main body 215 is viewed along the first direction D1 (see FIGS. 8 to 10 ). In FIG. 10 , the outline shape of the area occupied by the circuit board 230 is indicated by a dotted line. With such a configuration, it is possible to reduce the possibility that the ink discharged from the discharge channel Ex1 in the first direction D1 adheres to the circuit board 230 .

In addition, when the main body portion 215 is viewed along the first direction D1, the opening Op12 is arranged outside the range where the circuit board 230 is located in the fourth direction D4, and in the third direction that is the longitudinal direction of the circuit board 230 . It is arranged between a pair of connector units Cn, Cn in the direction D3 (see FIGS. 8 to 10 ). With such a configuration, it is possible to reduce the possibility that the ink discharged from the discharge channel Ex1 adheres to one of the connector units Cn, Cn.

On the platen 115 of the liquid ejecting device 100, an ink absorbing portion Ab1 is provided that is relatively opposite to the second opening when the carriage 116 exists at least a part of the range of reciprocating movement in the main scanning direction. Opc is positioned on the first direction D1 side, and absorbs the liquid discharged from the second opening Opc (see FIG. 1 ). With such a configuration, the ink discharged from the main body portion 215 and discharged out of the carriage 116 can be recovered without adhering to other structures.

In addition, the second opening Opc in the present embodiment is a large opening that exposes the opening Op12 and the nozzle plate 280 when the carriage 116 is viewed along the second direction D2. However, the size of the second opening Opc may be set to be a small opening that exposes the opening Op12 without exposing the nozzle plate 280 . However, in this case, it is necessary to separately prepare a large opening for exposing the nozzle plate 280 .

FIG. 11 is an explanatory view showing the positional relationship between the first opening Op11 of the discharge passage Ex1 and the first wall W11 on the main body portion 215 (see the lower central portion of FIG. 5 ). FIG. 11 is an explanatory diagram for facilitating technical understanding, and is not a diagram showing exact dimensions of each part of the main body portion 215 .

When viewing the main body portion 215 of the bracket 210 along the first direction D1, the outer shape of the first opening Op11 is a circle with a diameter Ld. More specifically, Ld is 1.0 mm. The first wall portion W11 has a recessed portion W11r in which the inner peripheral surface of the first wall portion W11 is recessed toward the outer peripheral surface of the first wall portion W11. In other words, the concave portion W11r is a portion where the thickness in the fourth direction D4 of the first wall portion W11 is reduced (see the lower central portion in FIG. 5 ). When viewing the main body portion 215 of the bracket 210 along the first direction D1, the shape of the concave portion W11r is an arc. When viewing the main body portion 215 along the first direction D1, the main body portion 215 is configured such that a straight line SL1 connecting both ends of the recessed portion W11r overlaps with the first opening Op11. In addition, in the embodiment in which the first wall portion has straight portions on both sides of the recess, the end of the recess is a connecting portion between the recess and the straight portion. The length of the straight line SL1 connecting both ends of the recessed portion W11r is shorter than the length of the straight line portion of the first wall portion provided on both sides of the recessed portion.

With such a configuration, the ink present at the junction between the surface Ts of the main body 215 and the first wall W11 can be introduced into the first opening Op11 and discharged to the outside of the main body 215 . In addition, the connection part of the surface Ts and the 1st wall part W11 is shown by the circular arc (refer W11r) which shows the outer edge of the 1st wall part W11, and the straight line of both sides in FIG.

The shortest distance Lop between the inner peripheral surface of the recess W11r and the edge of the first opening Op11 was 0.2 mm. With such a configuration, the ink present at the junction between the surface Ts of the main body 215 and the first wall W11 can be introduced into the first opening Op11 and discharged to the outside of the main body 215 .

The minimum distance Lop between the edge of the first opening Op11 and the first wall W11 is 1/5 of the length Ld of the diameter of the first opening Op11 which is the largest line segment that can be arranged in the first opening Op11 . The shape and size of the first opening Op11 are determined in consideration of the viscosity of the ink, the wettability of the ink and the material of the main body portion 215 , and the like. Therefore, by setting the minimum distance Lop between the edge of the first opening Op11 and the first wall W11 to be such a size, the ink existing at the connection portion between the surface Ts of the main body portion 215 and the first wall W11 can be reduced. , and the ink moving toward the connecting portion is discharged to a predetermined location outside the main body portion 215 through the discharge channel Ex1. Therefore, it is possible to reduce the possibility that the ink leaked from the connection portion between the ink cartridge 117 and the ink supply needle 205 of the holder 210 leaks outside the surrounding wall W10 to cause trouble.

FIG. 12 is a view showing a part of the cavity Cv of the mold when the structures of the first opening Op11 and the first wall W11 of the discharge passage Ex1 on the main body portion 215 are cast by the mold. FIG. 12 is an explanatory diagram for facilitating technical understanding, and does not accurately show the dimensions of the first opening Op11 and the first wall part W11 .

A pin Pn for constituting a linear flow path penetrating through the main body portion 215 along the first direction D1 , that is, the discharge path Ex1 , is attached to the cavity Cv of the die. The positions of the pins Pn in the state of being mounted in the mold are indicated by dotted lines. The pin Pn installed in the die protrudes from the upper surface in FIG. 12 of the cavity Cv of the die, and this protruding portion functions to form the discharge passage Ex1. In addition, actually, a cavity for constituting the bottom of the main body portion 215 and the first wall portion W11 is arranged on the right side and the upper side of a part of the cavity Cv shown in FIG. 12 .

By configuring the first opening Op11 and the first wall W11 of the discharge passage Ex1 as shown in FIG. 11 , it is not necessary to attach the pin Pn to the mold so as to be in contact with the end of the mold. Therefore, it is difficult to damage the pin Pn and the die when mounting the pin Pn in the die. As a result, the main body portion 215 can be easily manufactured by casting using a mold.

The main body part 215 in this embodiment is also called a "1st flow path member." The ink supply needle 205 is also called a "supply needle" or a "liquid introduction part". The mounting portion 214 is also referred to as a "second flow channel member". The ink cartridge 117 is also referred to as a "liquid storage part". The conveyance motor 119 is also referred to as a "transportation unit".

A4. Modifications of the first opening and the first wall of the discharge channel:

Hereinafter, modifications of the first opening Op11 and the first wall W11 of the discharge passage Ex1 in the main body portion 215 in the first embodiment shown in FIG. 11 will be described. In the following modifications, the points other than the configuration of the first opening and the first wall of the discharge passage are the same as those of the first embodiment.

(1) Modification 1:

13 is an explanatory view showing the positional relationship between the first opening Op21 of the discharge passage Ex2 on the main body portion 215 and the first wall portion W21 in Modification 1. FIG. The position of the first opening Op21 of the discharge passage Ex2 on the main body portion 215 is substantially the same as that of the first opening Op11 of the discharge passage Ex1 on the main body 215 shown at the center portion of the lower stage in FIG. 5 . In addition, FIG. 13 is an explanatory diagram for making technical understanding easier, and is not a diagram showing the dimensions of each part of the main body part 215 accurately.

When viewing the main body portion 215 of the bracket 210 along the first direction D1 , the outer shape of the first opening Op21 is a circle with a diameter Ld. The first wall portion W21 is arranged linearly along the third direction D3. The first wall portion W21 does not have the concave portion W11r as shown in FIG. 11 . When viewing the main body portion 215 along the first direction D1 , the edge of the first opening Op21 is in contact with the first wall portion W21 .

As such, the ink existing at the connection portion between the surface Ts of the body portion 215 and the first wall portion W21 can be introduced into the first opening Op21 to be discharged to the outside of the body portion 215 . In addition, the connection part of the surface Ts and the 1st wall part W21 is shown by the straight line which shows the outer edge of the 1st wall part W21 in FIG.

(2) Modification 2:

14 is an explanatory view showing the positional relationship between the first opening Op31 of the discharge passage Ex3 on the main body portion 215 and the first wall portion W31 in Modification 2. FIG. The position of the first opening Op31 of the discharge passage Ex3 on the main body portion 215 is substantially the same as that of the first opening Op11 of the discharge passage Ex1 on the main body 215 shown at the center portion of the lower stage in FIG. 5 . In addition, FIG. 14 is an explanatory diagram for making technical understanding easier, and is not a diagram showing the dimensions of each part of the main body part 215 accurately.

When viewing the main body portion 215 of the bracket 210 along the first direction D1 , the outer shape of the first opening Op31 is a semicircle with a diameter Ld. The first wall portion W31 is arranged linearly along the third direction D3. The first wall portion W31 does not have the concave portion W11r shown in FIG. 11 . In Modification 2, the boundary line between the surface Ts and the first wall portion W31 defines a part of the edge of the first opening Op31. More specifically, when the main body portion 215 of the holder 210 is viewed along the first direction D1, the linear portion of the semicircular first opening Op31 coincides with the inner surface of the first wall portion W31.

With such a configuration, the ink adhering to the connection portion between the surface Ts of the main body 215 and the first wall W31 can be introduced into the first opening Op31 and discharged to the outside of the main body 215 . In addition, in Modification 2, when referred to as "the connection portion between the surface Ts and the first wall W31", the surface Ts includes a virtual plane that is located on the extension line of the surface Ts accompanying the solid and blocks the first opening Op31. . As a result, the connection portion between the surface Ts and the first wall W31 , that is, the boundary line is shown by a straight line indicating the outer edge of the first wall W31 in FIG. 14 .

(3) Variation 3:

15 is an explanatory view showing the positional relationship between the first opening Op41 of the discharge passage Ex4 on the main body portion 215 and the first wall portion W41 in Modification 3. FIG. The position of the first opening Op41 of the discharge passage Ex4 on the main body part 215 is substantially the same as that of the first opening Op11 of the discharge passage Ex1 on the main body part 215 shown in the lower central portion of FIG. 5 . In addition, FIG. 15 is an explanatory diagram for making technical understanding easier, and is not a diagram showing the dimensions of each part of the main body part 215 accurately.

When viewing the main body portion 215 of the bracket 210 along the first direction D1 , the outer shape of the first opening Op41 is a circle with a diameter Ld. The first wall portion W41 is arranged along the third direction D3. The first wall portion W41 has a concave portion W41r in which the inner peripheral surface of the first wall portion W41 is recessed toward the outer peripheral surface of the first wall portion W41.

In Modification 3, the main body portion 215 is configured such that the straight line SL4 connecting both ends of the recessed portion W41r overlaps the first opening Op41 when viewed along the first direction D1. Furthermore, a boundary line between the surface Ts of the main body portion 215 and the first wall portion W41 defines a part of the edge of the first opening Op41 . More specifically, when the main body 215 of the holder 210 is viewed along the first direction D1, a part of the arc of the circular first opening Op41 coincides with the inner surface of the recess W41r of the first wall W41.

With such a configuration, the ink adhering to the connection portion between the surface Ts of the body portion 215 and the first wall portion W41 can also be introduced into the first opening Op41 to be discharged to the outside of the body portion 215 . In addition, in Modification 3, when referred to as "the connection portion between the surface Ts and the first wall portion W41", the surface Ts includes a virtual plane that is located on the extension line of the surface Ts accompanied by a solid and closes the first opening Op41. . As a result, the connection portion between the surface Ts and the first wall W41, that is, the boundary line is represented by an arc (refer to W41r) and straight lines on both sides of the outer edge of the first wall W41 in FIG. 15 .

(4) Variation 4:

16 is an explanatory view showing the positional relationship between the first opening Op51 of the discharge passage Ex5 on the main body portion 215 and the first wall portion W51 in Modification 4. FIG. The position of the first opening Op51 of the discharge passage Ex5 on the main body portion 215 is substantially the same as that of the first opening Op11 of the discharge passage Ex1 on the main body 215 shown at the center portion of the lower stage in FIG. 5 . In addition, FIG. 16 is an explanatory diagram for making technical understanding easier, and is not a diagram showing the dimensions of each part of the main body part 215 accurately.

When viewing the main body portion 215 of the bracket 210 along the first direction D1, the outer shape of the first opening Op51 is a circle with a diameter Ld. The first wall portion W51 is arranged along the third direction D3. The first wall portion W51 has a recessed portion W51r in which the inner peripheral surface of the first wall portion W51 is recessed toward the outer peripheral surface of the first wall portion W51.

In Modification 4, when the main body portion 215 is viewed along the first direction D1, the first opening Op51 does not exist inside the concave portion W51r beyond the straight line SL5 connecting both ends of the concave portion W51r. More specifically, when the main body portion 215 is viewed along the first direction D1, the edge of the first opening Op51 is in contact with the straight line SL5 connecting both ends of the concave portion W51r.

Also with such a structure, the main body part 215 can be manufactured easily by casting using a mold (refer FIG. 12).

In Modification 4, the shortest distance Lop between the inner peripheral surface of the concave portion W51r and the edge of the first opening Op51 is 0.4 mm. The distance Lop is 40% of the length Ld of the diameter of the first opening Op51 , which is the largest line segment that can be arranged in the first opening Op51 . With such a configuration, ink present at the connection portion between the surface Ts of the main body 215 and the first wall W51 can be introduced into the first opening Op51 to be discharged to the outside of the main body 215 . In addition, the connection part of surface Ts and 1st wall part W51 is shown by the circular arc (refer W51r) which shows the outer edge of 1st wall part W51, and the straight line of both sides in FIG.

A5. Modifications of the ink absorbing part:

Hereinafter, a modified example of the ink absorbing portion Ab1 in the first embodiment described above will be described (see FIG. 1 ). In the following modifications, the points other than the configuration of the ink absorbing portion are the same as those of the first embodiment.

(1) Modification 1:

In Modification 1, an ink absorbing portion Ab2 is provided on the carriage 116 instead of the ink absorbing portion Ab1 provided on the platen 115 in the first embodiment. More specifically, the ink absorbing portion Ab2 including a porous member is attached to the carriage 116 at a portion indicated by a dotted line in FIG. 10 . The porous member of the ink absorbing portion Ab2 absorbs the ink discharged from the discharge channel Ex1. With such a configuration, the liquid discharged from the liquid ejection head 200 can also be recovered by the porous member.

(2) Modification 2:

In Modification 2, the ink absorbing portion Ab1 provided on the platen 115 in the first embodiment is not provided. In Modification 2, when the liquid ejecting device 100 is viewed along the first direction D1, when there is the carriage 116 in at least a part of the range of reciprocating movement in the main scanning direction, the opening Op12 of the discharge passage Ex1 and The second opening Opc of the carriage 116 is arranged at a position overlapping the trajectory of the printing medium P conveyed by the conveyance motor 119 . In addition, "the trajectory of the conveyed printing medium P" means the area which the printing medium P may occupy by conveyance.

With such a configuration, the ink discharged from the second opening Opc adheres to the printing medium P on the transport path. As a result, ink leakage can be quickly notified to the user.

In addition, the position overlapping the trajectory of the printing medium P transported by the transport motor 119 may be a position overlapping the rollers provided on the platen 115 that transport the printing medium. In such an aspect, by transferring the ink adhering to the roller to the printing medium, it is possible to make the user notice ink leakage.

B. The second embodiment:

FIG. 17 is an explanatory diagram showing a schematic configuration of a liquid ejecting device 100 a including a liquid ejecting head 200 a in the second embodiment. The liquid ejecting device 100a is different from the liquid ejecting device 100 in the first embodiment in that a case 112a is provided instead of the case 112, an ink tank 150 is provided instead of the ink cartridge 117, and a pressure This point of regulating the valve 50 and this point of additionally providing the hose 160 . The liquid ejection head 200 a differs from the liquid ejection head 200 in the first embodiment in that a holder 210 a having ink supply needles 205 is provided instead of the holder 210 . Since other structures are the same as those of the first embodiment, the same symbols are assigned to the same structures, and their detailed descriptions are omitted. In addition, in FIG. 17, the internal structure of the liquid ejection apparatus 100a is shown by the dotted line. In addition, in FIG. 17, the state which can inject ink into the ink tank 150 is shown

The box body 112a has a substantially rectangular parallelepiped shape. The housing 112a has a front surface, a rear surface, a left side, a right side, an upper surface, and a bottom surface, and six sides constitute the housing 112a as a housing of the liquid ejecting device 100a.

The ink tank 150 stores ink which is a liquid supplied to the liquid jet head 200a. The ink tank 150 is accommodated in the accommodation mechanism 140 provided at the right side portion of the front surface of the liquid ejection device 100a. The storage mechanism 140 has a plate-shaped case 142 constituting a part of the front surface of the case 112a. The housing 142 has a rectangular shape, and a hinge 141 for fixing the housing 142 to the case body 112a and being rotatable in the arrow YR direction with the lower part as a fulcrum is provided at its lower part. The ink tank 150 is detachably attached to the casing 142 . The storage mechanism 140 is housed inside the case 112a when the liquid ejecting device 100a is in use, and when the user injects ink into the ink tank 150, the upper part of the housing 142 is rotated in the arrow YR direction to make the ink The tank 150 is exposed to the outside of the liquid ejection device 100a. In addition, the ink tank 150 may be provided outside the box 112a instead of being housed inside the box 112a.

The liquid ejecting device 100 a of the second embodiment includes four ink tanks 150 . Each ink tank 150 stores ink of a different color. The ink tanks 150 are arranged side by side along the X direction. The ink tank 150 has: a liquid inlet 153 for injecting ink into the interior; an air opening 151 for introducing air into the interior as the ink is consumed; a liquid outlet 155 connected to the hose 160 for The liquid ejection head 200a discharges the ink. In addition, an embodiment in which the liquid injection port 153 is not provided in the ink tank 150 can also be adopted.

The hose 160 functions as a supply channel for supplying the ink in the ink tank 150 to the liquid jet head 200a. The ink tank 150 is connected to a pressure regulating valve 50 provided between the bracket 210 a and the ink tank 150 through a hose 160 . Four pressure regulating valves 50 are provided corresponding to the respective ink tanks 150 that store the inks of the respective colors. The detailed structure of the pressure regulating valve 50 will be described later. The hose 160 is formed of a flexible member such as synthetic rubber.

Fig. 18 is a cross-sectional view showing the detailed structure of the pressure regulating valve. Fig. 18 shows a cross-section of the hose 160, the pressure regulating valve 50, and the bracket 210a cut along the X-Z plane. In addition, in FIG. 18 , the portion where the ink supply needle 205 is provided on the holder 210 a is enlarged and shown, and the illustration of the structure other than this portion is omitted. In the present embodiment, since the structures of the plurality of pressure regulating valves 50 are basically the same, any one of the pressure regulating valves 50 will be described.

The pressure regulating valve 50 is provided between the ink tank 150 and the ink supply needle 205, and regulates the pressure of the ink supplied to the liquid jet head 200a. The pressure regulating valve 50 temporarily stores ink supplied from the ink tank 150 via the hose 160 , and the ink temporarily stored in the pressure regulating valve 50 is supplied to the liquid jet head 200 a. The pressure regulating valve 50 is fixed by the bracket 210 a and the carriage 116 . In addition, the pressure regulating valve 50 may be fixed only by the bracket 210a. Although not shown in FIG. 18 , in the middle of the ink tank 150 or the hose 160 arranged on the upstream side of the pressure regulating valve 50 , there is provided a pressure-feeding ink tank toward the liquid jet head 200 a. 150 ink pressure feeding unit. As the pressure feeding means, for example, a pressing means for pressing the ink tank 150 from the outside, a pressurizing pump, etc. may be mentioned. In addition, a water level pressure difference generated by adjusting the relative position of the liquid jet head 200 a and the ink tank 150 in the direction of gravity may be used as the pressure feeding means.

On the holder 210a, the ink supply needle 205 is provided on the filter 213 (see FIG. 2). The ink supply needle 205 is inserted into the pressure regulating valve 50 . The ink supplied from the pressure regulating valve 50 is supplied to the nozzle 282 after passing through the inside of the ink supply needle 205 to remove foreign matter in the filter 213 .

The pressure regulating valve 50 is constituted by a valve which is provided in the middle of a flow path through which ink flows, and which opens and closes the flow path. The pressure regulating valve 50 includes a casing 51 and a valve body 55 provided in the casing 51 .

Inside the casing 51 are provided a main chamber 511 which communicates with the ink tank 150 via the hose 160 so as to be supplied with ink from the ink tank 150, and a sub-chamber 512 which communicates with the holder. The second channel 219 of 210a communicates. The main chamber 511 and the sub-chamber 512 are separated by a partition wall 513 . The main chamber 511 communicates with the sub-chamber 512 through a communication channel 514 provided through the partition wall 513 .

The main chamber 511 is formed by closing a recess formed on one surface of the housing 51 with a cover member 515 . The main chamber 511 is connected to the hose 160 via an inflow passage 516 provided on the casing 51 . The sub-chamber 512 has a concave shape opened at the side of the case 51 on the side opposite to the main chamber 511 . A flexible film 517 is pasted on the surface where the sub-chamber 512 opens, and the opening of the sub-chamber 512 is closed by the film 517 . As a material of the film 517, a high-density polyethylene film, polyethylene terephthalate (PET), etc. are mentioned, for example. One end of the outflow passage 518 communicates with the subchamber 512 , and a sealing member 519 is provided at the other end of the outflow passage 518 on the opposite side to the end connected to the subchamber 512 . The ink supply needle 205 described above is inserted into the sealing member 519 and connected to the outflow channel 518 .

A part of the thin film 517 constituting a part of the wall surface of the sub-chamber 512 serves as a diaphragm 517a. A pressure receiving plate 520 is provided on the surface of the diaphragm 517a on the side of the subchamber 512 . The pressure receiving plate 520 has a disk shape with an outer shape smaller than that of the diaphragm 517a. The pressure receiving plate 520 is provided so that the valve body 55 that opens and closes the communication channel 514 does not directly contact the film 517 . As the pressure receiving plate 520 , for example, a material having higher rigidity than the film 517 such as resin or metal can be used.

The case 51 is formed, for example, by molding a resin material that is more rigid than the film 517 . A valve seat 52 against which the valve body 55 abuts is provided around the opening of the partition wall 513 on the main chamber 511 side. A valve body 55 is inserted through the communicating flow path 514 . The valve body 55 includes a valve body body 550 and a contact member 560 . The valve main body 550 includes a shaft portion 551 inserted into the communication channel 514 and a flange portion 552 provided at an end portion of the shaft portion 551 inside the main chamber 511 .

The shaft portion 551 has a slightly smaller outer diameter than the communicating channel 514 . Among the ends of the shaft portion 551 , one end portion disposed in the sub-chamber 512 is in contact with the central portion of the pressure receiving plate 520 . The other end portion of the shaft portion 551 on the opposite side to the end portion abutting against the pressure receiving plate 520 is arranged in the main chamber 511 and is integrally formed with the flange portion 552 . The valve main body 550 is movable in the +X direction and the -X direction.

The flange portion 552 is formed of a circular plate-shaped member. A contact member 560 is fixed to the flange portion 552 . The contact member 560 is formed of an elastic material such as rubber or an elastomer, and has an annular shape continuously provided around the shaft portion 551 . A spring 56 is provided between the flange portion 552 and the cover member 515 that defines the main chamber 511 , and the valve body 55 is biased in the +X direction by the biasing force of the spring 56 . That is, the flange portion 552 functions as a spring support against which one end of the spring 56 abuts. When the flange portion 552 is biased by the spring 56 , the abutting member 560 abuts against the valve seat 52 and the communication channel 514 is blocked, that is, the pressure regulating valve 50 is closed.

By making the ink in the sub-chamber 512 flow downstream, the pressure in the sub-chamber 512 is reduced to a negative pressure compared with the atmospheric pressure, so that the diaphragm 517a moves in the -X direction, and the pressure receiving plate 520 overcomes the spring. 56 to press the valve body 55, thereby creating a gap between the abutment member 560 of the valve body 55 and the valve seat 52, so that the communication channel 514 is opened, that is, the pressure regulating valve 50 is opened. Open the valve. Ink is supplied from the main chamber 511 into the sub-chamber 512 by opening the pressure regulating valve 50 , so that the decompression in the sub-chamber 512 is eliminated, and the diaphragm 517 a is returned to the The original position, so that the communication channel 514 is blocked by the valve body 55, and the pressure regulating valve 50 is closed. In this manner, the pressure regulating valve 50 can regulate the pressure of the ink supplied from the ink tank 150 to the liquid jet head 200 a.

According to the liquid jet head 200a of the second embodiment described above, the same effect as that of the first embodiment can be achieved.

In addition, since the pressure regulating valve 50 for adjusting the pressure of the ink supplied to the liquid ejection head 200a is provided between the ink tank 150 and the holder 210a, the supply of ink from the ink tank 150 to the liquid ejection head 200a can be stabilized. .

In such a manner, when the liquid ejection head 200a is detached from the liquid ejection apparatus 100a, ink may leak between the hose 160 and the pressure regulating valve 50 or between the pressure regulating valve 50 and the ink supply needle 205. Condition. However, by applying the technology of the present disclosure, the leaked ink can be discharged to a predetermined location outside the main body portion 215 through the discharge channel Ex1.

The hose 160 in this embodiment is also called a "supply flow path". The ink tank 150 is also called a "liquid storage part".

C. Other Embodiment 1 of the Second Embodiment:

The liquid ejection device in another embodiment 1 of the second embodiment differs from the liquid ejection device 100 a in the second embodiment in that a damper 170 is provided instead of the pressure regulating valve 50 . Since other structures are the same as those of the second embodiment, the same symbols are assigned to the same structures, and their detailed descriptions are omitted.

FIG. 19 is a cross-sectional view showing the detailed structure of the damper 170 . In FIG. 19 , a cross section of the damper 170 cut along the X-Z plane is shown. In addition, in FIG. 19, the part where the ink supply needle 205 is provided in the holder 210a is enlarged and shown, and the illustration of the structure other than this part is abbreviate|omitted.

As shown in FIG. 19, the damper 170 is provided between the hose 160 and the bracket 210a, and is fixed to the bracket 210a. The damper 170 can also be expressed as being provided between the ink tank 150 and the ink supply needle 205 . The damper 170 absorbs ink pressure fluctuations caused by the movement of the carriage 116 . The damper 170 includes a case 171 and a flexible film 173 . The casing 171 is formed of an elastic material such as rubber or elastomer, for example. The film 173 is formed of, for example, a film member made of high-density polyethylene film, polyethylene terephthalate (PET), or the like.

The housing 171 is provided with an inflow port 174 , an outflow port 175 and a damper chamber 172 . The damper chamber 172 is partitioned by covering a recess-shaped space provided inside the casing 171 and recessed in the −X direction from the +X direction side with the film 173 . That is, the damper chamber 172 is provided between the ink tank 150 and the ink supply needle 205 . The inlet 174 is a through hole penetrating the outer surface of the case 171 in the +X direction. Inflow port 174 communicates hose 160 with damper chamber 172 . The outflow port 175 is a through hole penetrating the outer surface of the casing 171 in the −Z direction. The inner diameter of the outflow port 175 is substantially the same as the outer diameter of the ink supply needle 205 , and the damper chamber 172 communicates with the ink supply needle 205 by inserting the ink supply needle 205 into the outflow port 175 .

As described above, the ink supplied from the ink tank 150 is supplied to the damper chamber 172 via the hose 160 . The ink supplied to the damper chamber 172 is supplied to the second flow path 219 of the holder 210 a via the ink supply needle 205 . Since a part of the wall surface defining the damper chamber 172 is constituted by the flexible film 173 , the pressure of the ink supplied to the liquid jet head 200 a can be absorbed by the displacement of the film 173 .

According to Embodiment 1 of the second embodiment described above, since the liquid ejection head includes the damper chamber 172 between the ink tank 150 and the holder 210a, and the damper chamber 172 has the flexible film 173, it is possible to relax the liquid. Pressure fluctuations in the flow path of the ejection head.

In this manner, when the liquid ejection head 200a is detached from the liquid ejection device 100a, ink may leak between the hose 160 and the damper 170 or between the damper 170 and the ink supply needle 205. However, by applying the technology of the present disclosure, the leaked ink can be discharged to a predetermined location outside the main body portion 215 through the discharge channel Ex1.

D. Another embodiment 2 of the second embodiment:

The liquid ejection device in another embodiment 2 of the second embodiment differs from the liquid ejection device 100 a in the second embodiment in that the pressure regulating valve 50 is omitted. Since other structures are the same as those of the second embodiment, the same symbols are assigned to the same structures, and their detailed descriptions are omitted.

FIG. 20 is a cross-sectional view showing the structures of the hose 160 , the ink supply needle 205 , and the holder 210 a in another embodiment 2 of the second embodiment. In FIG. 20 , a cross section when the hose 160 and the bracket 210 a are cut along the X-Z plane is shown. In addition, in FIG. 20 , the part where the ink supply needle 205 is provided on the holder 210 a is enlarged and shown, and the illustration of the structure other than this part is omitted.

In another embodiment 2 of the second embodiment, the hose 160 functions as a supply channel for supplying the ink in the ink tank 150 to the ink supply needle 205 of the liquid jet head 200 a. As shown in FIG. 20 , the ink supply needle 205 is inserted into the hose 160 so that the hose 160 is fitted with the ink supply needle 205 . That is, the hose 160 and the ink supply needle 205 are directly connected. Therefore, the ink tank 150 and the second flow path 219 of the holder 210 a are connected via the hose 160 .

According to the other embodiment 2 of the second embodiment described above, since the hose 160 is provided as the supply flow path for supplying the ink in the ink tank 150 to the second flow path 219 of the holder 210a, it is possible to transfer the ink inside the ink tank 150 to the ink tank 150. The ink is supplied to the holder 210a.

Moreover, since the ink supply needle 205 for introducing the ink supplied from the hose 160 into the second flow passage 219 is provided on the holder 210 a, the hose 160 and the second flow passage 219 can be connected. Therefore, ink can be supplied from the ink tank 150 to the liquid jet head.

In this manner, when the liquid ejection head 200a is detached from the liquid ejection device 100a, ink may leak between the hose 160 and the ink supply needle 205 in some cases. However, by applying the technology of the present disclosure, the leaked ink can be discharged to a predetermined location outside the main body portion 215 through the discharge channel Ex1.

E. Other ways:

E1. Other ways 1:

(1) In the above-mentioned embodiment, the ink cartridge 117 and the ink tank 150 store ink so that the liquid ink and the air mainly meet at one interface, that is, the liquid surface, in the container. However, the liquid storage portion that stores the liquid supplied to the liquid ejection head may hold the liquid in the porous member. In this manner, the liquid is supplied from the liquid storage portion to the liquid ejection head without passing through the ink supply needle 205 (see FIG. 2 ). For example, in the liquid ejection head of the liquid ejection device of this type, a filter is provided at the tip of the cylindrical portion inserted into the liquid storage portion (see 213 in FIG. 2 ). The liquid held in the liquid storage portion is supplied to the liquid ejection head through the filter. A liquid jet head of this type is called a "chimney type".

(2) In the above-described embodiment, the discharge passage Ex1 is a through hole that linearly penetrates the main body portion 215 along the first direction D1 (see FIGS. 5 to 7 , 9 , and 10 ). However, the discharge passage that discharges the liquid from the surface Ts to the outside of the main body portion 215 may be a flow passage that bends halfway.

(3) In the first embodiment described above, the ink absorbing portion Ab1 is provided along the main scanning direction X on the platen 115 (see FIG. 1 ). However, the porous member that absorbs the liquid discharged from the discharge passage Ex1 may also be provided in the range of the main scanning direction X in which the carriage 116 is movable, and when the carriage 116 is at the standby position, it may be arranged in the same position as the discharge passage. The position corresponding to the opening Op12 of Ex1 and the second opening Opc of the carriage 116 . In such an aspect, the ink absorbing portion may not be provided at other locations.

(4) In the first embodiment, the outer shape of the first opening Op11 is a circle with a diameter Ld (see FIG. 11 ). However, the shape of the first opening is not limited to a circle, and may be any shape such as a semicircle, an ellipse, a polygon, or other shapes as shown in FIG. 14 . For example, when the shape of the first opening is a rectangle, the largest line segment that can be arranged in the first opening Op11 is a diagonal line of the rectangle. When the shape of the first opening is a triangle, the largest line segment that can be arranged in the first opening Op11 is the longest side among the three sides of the triangle.

(5) In the above-described embodiment, one connector unit Cn includes one connector on one surface and the other surface of the circuit board 230 (see FIGS. 3 and 8 ). Furthermore, the circuit board 230 includes four connectors. However, one connector unit Cn may also be one connector. However, it is preferable that the circuit board is provided with connectors at both ends of the circuit board 230 in the third direction D3.

(6) In the above-mentioned first embodiment, the minimum distance Lop between the edge of the first opening Op11 and the first wall W11 is the maximum line segment that can be arranged in the first opening Op11, the distance of the first opening Op11 1/5 of the length Ld of the diameter (refer to FIG. 11 ). Furthermore, in Modification 4 of the above-mentioned first embodiment, the shortest distance Lop between the inner peripheral surface of the recessed portion W51r and the edge of the first opening Op51 is, which is the largest line segment that can be arranged in the first opening Op51, The diameter of the first opening Op51 is 40% of the length Ld (see FIG. 16 ). However, the minimum distance between the edge of the first opening and the first wall can also be set to other values such as 1/3, 2/5, or the like of the length of the largest line segment that can be arranged in the first opening. For example, as shown in FIGS. 13 to 15 , the edge of the first opening may be in contact with the first wall. However, it is preferable that the minimum distance between the edge of the first opening and the first wall is 1/2 or less of the length of the largest line segment that can be arranged in the first opening.

(7) In each of the above-mentioned embodiments, the liquid ejected from the nozzle 282 may be other liquid than ink. For example can also be:

(i) Color materials used in the manufacture of color filters for image display devices such as liquid crystal displays;

(ii) Electrode materials used in electrode formation of organic EL (Electro Luminescence: electroluminescence) displays, field emission displays (Field Emission Display, FED), etc.;

(iii) liquids containing biological organisms used in the manufacture of biochips;

(iv) samples as precision pipettes;

(v) lubricating oil;

(vi) resin liquid;

(vii) Transparent resin liquids such as ultraviolet curable resin liquids for forming micro hemispherical lenses (optical lenses) and the like used in optical communication elements, etc.;

(viii) Liquids that spray etching solutions such as acids or alkalis to etch substrates, etc.;

(ix) Other arbitrary minute liquid droplets.

In addition, the "droplet" refers to the state of the liquid ejected from the liquid ejection device 100, 100a, and also includes the state of a granular shape, a tear shape, and a thread-like shape followed by a tail. In addition, the "liquid" mentioned here only needs to be such a material that can be consumed by the liquid ejection device 100, 100a. For example, "liquid" only needs to be a material in the state when the substance is in a liquid phase, materials in a liquid state with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, Materials in a liquid state such as solutions, liquid resins, and liquid metals (melt metals) are also included in the "liquid". In addition, not only liquid as a state of matter, but also substances in which particles of functional materials composed of solid matter such as color materials or metal particles are dissolved, dispersed, or mixed in a solvent are also included in "liquid". . Typical examples of the liquid include ink, liquid crystal, and the like. Here, the ink refers to inks of various liquid compositions including general water-based inks, oil-based inks, gel inks, hot-melt inks, and the like. Also in these configurations, the same effects as those of the respective embodiments can be achieved.

(8) In the first embodiment described above, the surrounding wall W10 is constituted by the plurality of wall parts W11 to W18 . However, the structure surrounding the wall W10 may be constituted by only the wall parts W11 to W14 without providing the wall parts W15 to W18.

E2. Other ways 2:

(1) In the above-mentioned first embodiment, the main body portion 215 as the first flow channel member is configured such that the straight line SL1 connecting both ends of the recessed portion W11r overlaps with the first opening Op11 (see FIG. 11 ). However, the first flow channel member may be configured such that the straight line connecting both ends of the recess does not overlap the first opening. That is, the first opening may also be provided at a position separated from the straight line connecting both ends of the concave portion. In this specification, "the straight line connecting both ends of the recess overlaps with the first opening" includes the case where the straight line connecting both ends of the recess touches the outer edge of the first opening (see FIG. 16 ).

(2) In the first embodiment described above, the outer shape of the recessed portion W11r is an arc (see FIG. 11 ). However, the outer shape of the concave portion W11r can be any shape such as an ellipse, a polygon, or other shapes. However, it is preferable that the outer shape of the recessed portion W11r is a shape having a constant distance from the shape of the first opening. Specifically, it is preferable that the outer shape of the recessed portion W11r is a shape similar to a part of the shape of the first opening.

E3. Other ways 3:

In Modification 4 of the first embodiment described above, the first opening Op51 does not exist inside the recess W51r beyond the straight line SL5 connecting both ends of the recess W51r (see FIG. 16 ). However, the first opening Op51 may exist inside the recessed part W51r beyond the straight line SL5 connecting both ends of the recessed part W51r (see FIG. 11 and FIG. 15 ).

E4. Other ways 4:

In the first embodiment described above, the shortest distance Lop between the inner peripheral surface of the concave portion W11r and the edge of the first opening Op11 is 0.2 mm. In Modification 4 of the above-described first embodiment, the shortest distance Lop between the inner peripheral surface of the recessed portion W51r and the edge of the first opening Op51 is 0.4 mm. However, the shortest distance between the inner peripheral surface of the recess and the edge of the first opening may also be 0.6 mm, 0.8 mm, 1.0 mm, 1.3 mm or other dimensions.

E5. Other ways 5:

In Modification 2 of the above-described first embodiment, the boundary line between the surface Ts and the first wall portion W31 defines a part of the edge of the first opening Op31 (see FIG. 14 ). However, it is also possible to adopt an aspect in which the boundary line between the surface and the first wall portion does not divide a part of the edge of the first opening (see FIG. 11 and FIG. 16 ). In addition, in this specification, "the boundary line between the surface and the first wall part divides a part of the edge of the first opening" includes the case where the boundary line between the surface and the first wall touches the edge of the first opening. way (see Figure 13).

E6. Other ways 6:

In the first embodiment described above, the first wall portion W11 is a wall portion located on the outermost side in the fourth direction D4, that is, on the fourth direction D4 side among the plurality of wall portions W11 to W18 (see FIG. 5 ). However, the first wall portion may be a wall portion that is not the outermost wall portion in the direction perpendicular to the first direction and the third direction among the plurality of wall portions. For example, the first opening Op11 may be provided at a position closer to one of the second wall W12 to the fourth wall W14 than the first wall W11 . However, it is preferable that the first opening Op11 is provided at a position closer to the first wall portion W11 than the second wall portion W12 to the fourth wall portion W14.

E7. Other ways 7:

In the first embodiment described above, when the main body 215 is viewed along the first direction D1, the opening Op12 is provided in the main body 215 at a position that does not overlap the circuit board 230 (see FIGS. 8 to 10 ). . However, the opening at the end of the discharge passage opposite to the first opening may also be provided at a position overlapping the circuit substrate.

E8. Other ways 8:

In the above-mentioned first embodiment, when the main body portion 215 is viewed along the first direction D1, the opening Op12 is arranged outside the range where the circuit board 230 is located in the fourth direction D4, and is located on the side of the circuit board 230. In the longitudinal direction, that is, in the third direction D3, it is arranged between a pair of connector units Cn, Cn (see FIGS. 8 to 10 ). However, the opening Op12 may also be arranged at the outer side of the pair of connectors in the third direction.

E9. Other ways 9:

In the above-described embodiment, the mounting portion 214 including the ink supply needle 205 as the liquid introduction portion and the main body portion 215 as the first flow path member are separately configured (see FIG. 2 ). However, the liquid introduction portion and the first flow path member may also be integrally produced.

E10. Other ways 10:

(1) In the above-mentioned first embodiment, the minimum distance C12 between the second wall part W12 of the main body part 215 and the mounting part 214, the minimum distance C13 between the third wall part W13 and the mounting part 214, and the fourth wall part W13 The minimum distance C14 between the wall part W14 and the attachment part 214 is 0.5 mm (refer FIG. 7). However, these dimensions may also be other dimensions such as 0.7 mm, 1.0 mm, and the like. In addition, these dimensions may be different from each other. However, preferably, these dimensions are 0.7 mm or less.

(2) In the first embodiment described above, the minimum distance C11 between the edge of the first opening Op11 and the mounting portion 214 is 10 mm (see FIG. 7 ). However, the minimum distance C11 between the edge of the first opening Op11 and the mounting portion 214 may also be 3 mm, 7 mm, 12 mm, and other dimensions. However, preferably, the minimum distance between the edge of the first opening and the second flow path member is 5 mm or more.

E11. Other ways 11:

In the first embodiment described above, the liquid ejecting device 100 has been described as including the liquid ejecting head 200 and the ink cartridge 117 (see FIG. 1 ). However, the liquid ejecting device 100 can be manufactured and sold without the ink cartridge 117 . In addition, in the second embodiment described above, the liquid ejecting device 100a has been described as including the liquid ejecting head 200a and the ink tank 150 (see FIG. 17 ). However, the liquid ejecting device 100 a can be manufactured and sold without the ink tank 150 .

E12. Other ways 12:

In the above-mentioned second embodiment, the liquid ejecting device 100a including the hose 160 functioning as a supply channel for supplying the ink in the ink tank 150 to the liquid ejecting head 200a has been described (see FIG. 17 ). However, like the first embodiment, the liquid ejecting device can also be configured without a supply channel for supplying the liquid in the liquid storage portion to the liquid introducing portion of the liquid ejecting head (see FIG. 1 ).

E13. Other ways 13:

In another embodiment 2 of the above-mentioned second embodiment, the supply channel is constituted by the hose 160 fitted with the ink supply needle 205 as the liquid introduction part (see FIG. 20 ). However, the supply flow path may also be formed as a part of a rigid pipe. In addition, like the above-mentioned second embodiment and other embodiment 1 of the above-mentioned second embodiment, the supply channel may be connected to a structure other than a liquid introduction part such as a pressure regulating valve or a damper (refer to FIGS. 18 and 19 ). ).

E14. Other ways 14:

The liquid ejecting device 100a of the above-mentioned second embodiment includes a pressure regulating valve 50 provided between the ink tank 150 serving as a liquid storage part and the ink supply needle 205 serving as a liquid introducing part, facing each other. The pressure of the liquid supplied from the liquid ejection head 200a is adjusted. However, like the first embodiment and other embodiments 1 and 2 of the above-mentioned second embodiment, the liquid ejecting device can also be configured without a pressure regulating valve. For example, instead of the pressure regulating valve 50 , the liquid ejecting device 100 a may include an intermediate tank temporarily storing ink.

E15. Other ways 15:

The liquid ejecting device 100a of the above-mentioned second embodiment includes a damper chamber 172 provided between the ink tank 150 as a liquid storage part and the ink supply needle 205 as a liquid introduction part, and the damper chamber 172 is arranged with Flexible membrane 173 . However, like the first embodiment and the second embodiment of the above-mentioned second embodiment, the liquid ejecting device can also be configured without a damper chamber.

E16. Other ways 16:

In Modification 1 of the above-described first embodiment, the ink absorbing portion Ab2 (see FIG. 10 ) is provided on the carriage 116 . However, like the first embodiment, it is also possible to employ an embodiment in which the carriage does not have a porous member that absorbs the liquid discharged from the discharge channel (see FIG. 1 ).

E17. Other ways 17:

(1) In the first embodiment described above, the second opening Opc (see FIG. 10 ) communicating with the opening Op12 of the discharge passage Ex1 is provided on the bottom surface of the carriage 116 . However, for example, in the case where the ink absorbing portion for absorbing the liquid discharged from the main body portion 215 as the first flow path member is provided in the carriage, the carriage may not be provided with the second opening communicating with the opening of the discharge passage. .

(2) In the first embodiment described above, the second opening Opc (see FIG. 10 ) communicating with the opening Op12 of the discharge passage Ex1 is provided on the bottom surface of the carriage 116 . However, for example, the second opening Opc on the bottom surface of the carriage 116 may not be provided at a position overlapping the opening Op12 of the discharge passage Ex1 when viewed from the second direction D2, but may be provided on the carriage 116. An exhaust passage communicating with the opening Op12 of the exhaust passage Ex1 is provided. According to such a configuration, the ink discharged from the opening Op12 of the discharge passage Ex1 can be discharged to an arbitrary place through the discharge passage provided on the carriage.

E18. Other ways 18:

In the above-described first embodiment, the ink absorbing portion Ab1 is provided on the platen 115 of the liquid ejecting apparatus 100 , and the ink absorbing portion Ab1 is arranged at the second opening Opc that is reciprocated by the carriage 116 . The first direction D1 side absorbs the liquid discharged from the second opening Opc (see FIG. 1 ). However, in the case where, for example, an ink absorbing portion for absorbing liquid discharged from the main body portion 215 as the first channel member is provided in the carriage, the carriage may not be provided with such a porous member.

E19. Other ways 19:

In Modification 2 of the above-described first embodiment, the opening Op12 of the discharge path Ex1 and the second opening Opc of the carriage 116 are arranged at positions overlapping with the trajectory of the printing medium P being conveyed. However, for example, when the porous member is set within the range of the main scanning direction X in which the carriage 116 can move and the carriage 116 is at the standby position, the opening Op12 of the discharge passage Ex1 and the second opening Opc of the carriage 116 are the same. In the form at the corresponding position, the opening Op12 and the second opening Opc may not be arranged at a position overlapping with the trajectory of the printing medium P to be conveyed.

F. Another way:

The present disclosure is not limited to the above-described embodiments, and can be implemented in various configurations without departing from the gist. For example, in order to solve part or all of the above-mentioned problems, or to achieve part or all of the above-mentioned effects, the technical features in the embodiments corresponding to the technical features in the various forms described in the summary of the invention can be appropriately adjusted. Make substitutions or combinations. In addition, as long as the technical feature is not described as an essential technical feature in this specification, it can be appropriately deleted.

(1) According to one embodiment of the present disclosure, there is provided a liquid ejection head. In this liquid jet head, a nozzle plate is provided with a plurality of nozzles for jetting liquid in a first direction; a first flow channel member is arranged opposite to the first direction with respect to the nozzle plate. The direction is the second direction side, and a flow channel for supplying liquid to the nozzle is provided inside; the liquid introduction part is arranged on the second direction side with respect to the first flow channel member, and is arranged from the Liquid is introduced into the flow path from the outside of the liquid jet head, and the first flow path member has a surrounding wall erected in the second direction from a surface on the second direction side of the first flow path member. set, and surround the liquid introduction part; a discharge channel, which discharges liquid from the surface to the outside of the first channel member, and a first opening is provided on the surface, and the first opening is the a part of the discharge passage, and opens toward the second direction, the surrounding wall has a first wall portion, the first wall portion is arranged along a third direction perpendicular to the first direction, the The minimum distance between the edge of the first opening and the first wall is 1/2 or less of the length of the largest line segment that can be arranged in the first opening.

In such an aspect, the first opening of the discharge passage is provided within a distance of 1/2 or less of the length of the largest line segment that can be arranged in the first opening with respect to the first wall portion. Therefore, it is possible to discharge the liquid present at the connection portion between the surface of the first flow path member in the second direction and the first wall portion from the discharge passage to a predetermined position outside the first flow path member, and move toward the connection portion. liquid is more likely. Therefore, it is possible to reduce the possibility of the liquid leaking outside the surrounding wall and causing troubles.

(2) In the liquid ejecting head of the above aspect, the first wall portion may have a concave portion such that the inner peripheral surface of the first wall portion faces the first wall portion. The outer peripheral surface of the recess is recessed, and when the first flow channel member is viewed along the first direction, the first flow channel member overlaps the first opening with a straight line connecting both ends of the recess. constituted in a manner.

According to such an aspect, the liquid present at the connection portion between the surface of the first flow channel member in the second direction and the first wall can be introduced into the first opening so that it can flow toward the side of the first flow channel member. External discharge.

(3) In the liquid ejecting head of the above aspect, when the first flow path member is viewed along the first direction, the first opening may exceed the portion connecting the concave portion. The straight lines at both ends do not exist inside the concave portion.

According to such an aspect, the first runner member can be easily manufactured by casting using a mold.

(4) In the liquid jet head of the above aspect, the shortest distance between the inner peripheral surface of the recess and the edge of the first opening may be 0.5 mm or less.

According to such an aspect, the liquid present at the connection portion between the surface of the first flow channel member in the second direction and the first wall can be introduced into the first opening so that it can flow toward the side of the first flow channel member. External discharge.

(5) In the liquid ejecting head of the above aspect, a boundary line between the surface and the first wall portion may define a part of the edge of the first opening.

According to such an aspect, the liquid adhering to the connection portion between the surface of the first flow channel member in the second direction and the first wall can be introduced into the first opening so that it can flow toward the side of the first flow channel member. External discharge.

(6) In the liquid ejecting head of the above aspect, the surrounding wall may have a plurality of wall portions, and the plurality of wall portions include the first wall portion and are separated from the first wall portion. direction and the direction orthogonal to the third direction are provided at different positions, the first wall portion is, in the direction orthogonal to the first direction and the third direction, the An outermost wall portion among the plurality of wall portions.

In this manner, when the liquid ejection head is tilted in a direction including a rotation component centered on a direction parallel to the third direction, the liquid is directed toward the second direction side of the first channel member. The surface and the connection part of the first wall part flow. Therefore, such a liquid can be introduced into the first opening to be discharged to the outside of the first flow path member.

(7) In the liquid ejection head of the above aspect, a circuit board for driving the liquid ejection head may be provided between the nozzle plate and the first flow path member, An opening at an end opposite to the first opening in the discharge passage is provided at a position not to overlap the circuit substrate when the first flow path member is viewed along the first direction.

By adopting such an aspect, it is possible to reduce the possibility that the liquid discharged from the discharge channel adheres to the circuit board.

(8) In the liquid ejection head of the above aspect, when the circuit board is viewed along the first direction, the outer shape of the circuit board may be such that the third The direction is set as the long side direction, and the direction perpendicular to the first direction and the third direction is set as a substantially rectangular shape with the short side direction, and the first flow channel member is carried out along the first direction. When viewed, the outer shape of the first flow path member is a substantially rectangular shape including the circuit board, and the third direction is defined as a long-side direction, and is aligned with the first direction and the third direction. The direction perpendicular to the direction is set as a substantially rectangular shape in the short side direction, the circuit board has a pair of connectors provided at both ends in the third direction, and the When viewed from the first flow path member, the opening at the opposite end is arranged outside the range where the circuit board is located in the direction perpendicular to the first direction and the third direction, and disposed between the pair of connectors in the third direction.

In such a manner, the circuit board has a pair of connectors at both ends in the longitudinal direction. Therefore, the distance from the connector to each circuit on the circuit board can be shortened as a whole. Furthermore, the opening at the end of the discharge channel opposite to the first opening is arranged outside the range where the circuit board is located in the direction perpendicular to the first direction and the third direction, and is arranged at a position in the third direction. between the pair of connectors. Therefore, it is possible to reduce the possibility that the liquid discharged from the discharge channel adheres to one of the connectors.

(9) In the liquid ejection head of the above aspect, it may be configured to include a second flow path member having as the liquid introduction portion inserted into the liquid ejection head. The supply needle in the structure of the head supply liquid.

According to such an aspect, the liquid can be supplied to the inside of the liquid ejection head through the second channel member having the supply needle.

(10) In the liquid jet head of the above aspect, the plurality of wall portions may include a second wall portion that faces the first wall portion and extends along the third wall portion. The direction is configured; the third wall portion is configured along a direction perpendicular to the first direction and the third direction; the fourth wall portion is opposite to the third wall portion and along the The direction perpendicular to the first direction and the third direction is arranged, and when the first flow channel member and the second flow channel member are viewed along the first direction, the first The minimum distance between the second wall part and the second flow channel part, the minimum distance between the third wall part and the second flow channel part, and the minimum distance between the fourth wall part and the second flow channel part The minimum distance between channel components is less than 0.7 mm, and the minimum distance between the edge of the first opening and the second channel component is more than 5 mm.

When the liquid ejection head is inclined so that the second wall is lower than the first wall, the liquid is held between the second wall and the second channel member. When the liquid ejection head is inclined so that the third wall is lower than the fourth wall, the liquid is held between the third wall and the second channel member. When the liquid ejection head is inclined so that the fourth wall is lower than the third wall, the liquid is held between the fourth wall and the second channel member. As a result, in those cases, the possibility of liquid adhering to other components can be reduced. On the other hand, when the liquid ejection head is inclined so that the first wall is lower than the second wall, the liquid is not held between the first wall and the second flow path member. Instead, it can be discharged from the first opening to a predetermined location outside.

(11) According to another aspect of the present disclosure, there is provided a liquid ejection device including: the liquid ejection head according to the above aspect; and a liquid storage unit for storing the liquid supplied to the liquid ejection head.

According to such an aspect, the liquid can be supplied to the liquid ejection head.

(12) In the liquid ejecting device of the above aspect, it may be configured to include a supply flow channel that supplies the liquid in the liquid storage portion to the liquid introduction portion of the liquid ejection head. liquid.

According to such an aspect, the liquid can be supplied to the liquid ejection head.

(13) In the liquid ejecting device of the above aspect, the supply channel may be configured by a tube fitted to the liquid introduction portion.

According to such an aspect, even if the liquid leaks when the hose and the liquid introduction part are inserted and removed, the liquid can be discharged from the discharge channel.

(14) In the liquid ejecting device of the above aspect, it is possible to provide a pressure regulating valve provided between the liquid storage part and the liquid introduction part so as to face each other. The pressure of the liquid supplied by the liquid ejecting head is adjusted.

According to such an aspect, the liquid can be stably supplied to the liquid ejection head. In addition, in a structure in which, for example, a pressure regulating valve as a structure for supplying liquid to a liquid ejection head is inserted into or pulled out from a supply needle as a liquid introduction part, even if the liquid leaks during this insertion and extraction, it is possible to The liquid is discharged from the discharge channel.

(15) In the liquid ejecting device of the above aspect, it is possible to provide a damper chamber provided between the liquid storage part and the liquid introduction part and arranged Flexible membrane.

According to such an aspect, the damper chamber can moderate the pressure fluctuation of the liquid supplied to the liquid ejection head.

(16) In the liquid ejecting device of the above aspect, it is possible to provide a carriage that holds the liquid ejecting head and moves the liquid ejecting head, and includes a The porous member absorbs the discharged liquid through the discharge channel.

According to such an aspect, the liquid discharged from the liquid ejection head can be recovered by the porous member.

(17) In the liquid ejecting device of the above aspect, it is possible to provide a carriage that holds the liquid ejecting head and moves the liquid ejecting head, and the discharge channel is , penetrating the through hole of the first channel member in the first direction, and a second opening communicating with the discharge passage is provided on the bottom surface of the carriage.

With such an aspect, the liquid can be discharged to the outside of the carriage through the second opening.

(18) In the liquid ejecting device according to the above aspect, it may be configured to include a porous member arranged on the first direction side with respect to the second opening so as to be opposite to the second opening. The second opening is absorbed by the discharged liquid.

According to such an aspect, the liquid discharged outside the carriage can be recovered.

(19) In the liquid ejecting device of the above aspect, it may be configured to include a conveying unit that conveys the medium dropped by the liquid ejected from the nozzle, The second opening is arranged at a position where a trajectory of the medium conveyed by the conveying unit overlaps with the second opening when the liquid ejecting device is viewed from a first direction.

Since the liquid discharged from the second opening adheres to the medium on the transport path, it is possible to quickly notify the user of the liquid leakage.

The present disclosure can also be implemented in various forms other than the liquid ejection head and the liquid ejection device. For example, it can be implemented as a method of manufacturing or controlling a liquid ejection head and a liquid ejection device, a computer program for realizing the control method, a non-transitory recording medium in which the computer program is recorded, or the like.

Not all of the plurality of constituent elements included in the various aspects of the present disclosure described above are essential constituent elements, and in order to solve some or all of the above-mentioned problems, or to achieve some or all of the effects described in this specification, it is possible to Some constituent elements of the plurality of constituent elements are appropriately changed, deleted, replaced with new other constituent elements, and some of the limited contents are deleted. In addition, in order to solve part or all of the above-mentioned problems, or to achieve part or all of the effects described in this specification, part or all of the technical features included in the above-mentioned one aspect of the present disclosure can be combined with the above-mentioned A part or all of the technical features included in the other aspects of the present disclosure may be combined to make an independent aspect of the present disclosure.

Symbol Description

Ab1...Ink absorbing part; Ab2...Ink absorbing part; C11...Minimum distance; C12...Minimum distance; C13...Minimum distance; C14...Minimum distance; Cn...Connector unit; Ct...Connecting terminal; Cv...Cavity; D2...Second direction; D3...Third direction; D4...Fourth direction; Ex1...Exit channel; Ex2...Exit channel; Ex3...Exit channel; Ex4...Exit channel; Ld...diameter; Lop...the shortest distance between the first wall and the edge of the first opening; Op11...the first opening; Op12...the opening; Op21...the first opening; Op31...the first opening; Op41...the first opening 1 opening; Op51 ... first opening; Opc ... second opening; P ... printing medium; Pn ... pin; SL1 ... straight line connecting both ends of the recess W11r; SL4 ... straight line connecting both ends of the recess W41r; Straight line at both ends; Ts...bottom surface (surface); W10...surrounding wall; W11...first wall; W11r...recess; W12...second wall; W13...third wall; W14...fourth wall; W15 ...fifth wall; W16...sixth wall; W17...seventh wall; W18...eighth wall; W21...first wall; W31...first wall; W41...first wall; W41r... Recess; W51...first wall; W51r...recess; X...main scanning direction; Y...sub-scanning direction; 50...pressure regulating valve; 51...shell; 52...valve seat; 55...valve body; 56...spring; 100 ...liquid ejection device; 100a...liquid ejection device; 110...control section; 112...casing; 112a...casing; 113...flexible flat cable; 114...drive belt; 115...platen; 116...sledge; 117... Ink cartridge; 118... carriage motor; 119... conveying motor; 140... storage mechanism; 141... hinge; 142... shell; 150... ink tank; 151... atmospheric opening; 153... liquid inlet; 160...Hose; 170...Damper; 171...Shell; 172...Damper chamber; 173...Membrane; 174...Inlet; 175...Outlet; 200...Liquid ejection head; Needle; 210...Bracket; 210a...Bracket; 211...Seal; 213...Filter; 214...Installation part; 215...Body part; 230...circuit substrate; 231...first through hole; 233...opening; 240...actuator unit; 241...fixed plate; 242...COF substrate; 243...piezoelectric body; 250...shell; 253...first flow channel; 255... storage space; 260... vibrating plate; 261... ink inlet; 270... flow path forming member; 273... third flow path; 280... nozzle plate; 281... nozzle row; 282... nozzle; 290... cover; 291... Through hole; 293...screw; 511...main chamber; 512...secondary chamber; 513...next wall; Channel; 519...Sealing member; 520...Pressure receiving plate; 550...Valve body main body; 551...Shaft portion; 552...Flange portion; 560...Abutment member.

Claims (22)

1. A liquid ejecting head includes:

a nozzle plate provided with a plurality of nozzles for ejecting liquid in a first direction;

a first flow path member that is disposed on a second direction side, which is a direction opposite to the first direction, with respect to the nozzle plate, and that is provided with a flow path for supplying liquid to the nozzles therein;

a liquid introduction portion which is disposed on the second direction side with respect to the first flow path member and introduces liquid from outside the liquid ejecting head to the flow path,

the first flow path member has:

a surrounding wall which is provided upright from a surface of the first flow path member on the second direction side toward the second direction and surrounds the liquid introduction portion;

a discharge passage which discharges liquid from the surface to the outside of the first flow path member,

a first opening is provided on the surface, the first opening being part of the discharge channel and opening towards the second direction,

the surrounding wall has a first wall portion arranged along a third direction orthogonal to the first direction,

the minimum distance between the edge of the first opening and the first wall part is less than 1/2 of the length of the largest line segment which can be configured in the first opening,

The first wall portion has a concave portion, the concave portion being concave toward an outer peripheral surface of the first wall portion,

the first flow path member is configured such that a straight line connecting both ends of the concave portion overlaps the first opening when the first flow path member is viewed in the first direction.

2. The liquid ejecting head as claimed in claim 1, wherein,

the first opening is located beyond the straight line connecting both ends of the recess and is not located inside the recess when the first flow path member is viewed in the first direction.

3. The liquid ejecting head as claimed in claim 2, wherein,

the shortest distance between the inner peripheral surface of the concave portion and the edge of the first opening is 0.5mm or less.

4. The liquid ejecting head as claimed in claim 3, wherein,

all of the plurality of wall portions constituting the surrounding wall are provided upright from the surface toward the second direction.

5. The liquid ejecting head as claimed in claim 3, wherein,

the surrounding wall has a plurality of wall portions including the first wall portion and disposed at different positions in a direction orthogonal to the first direction and the third direction,

The first wall portion is an outermost wall portion of the plurality of wall portions in the direction orthogonal to the first direction and the third direction.

6. The liquid ejecting head as claimed in claim 5, wherein,

a circuit board for driving the liquid ejecting head is provided between the nozzle plate and the first flow path member,

an opening of the discharge passage at an end opposite to the first opening is provided at a position not overlapping the circuit substrate when the first flow path member is viewed in the first direction.

7. A liquid ejecting head includes:

a nozzle plate provided with a plurality of nozzles for ejecting liquid in a first direction;

a first flow path member that is disposed on a second direction side, which is a direction opposite to the first direction, with respect to the nozzle plate, and that is provided with a flow path for supplying liquid to the nozzles therein;

a liquid introduction portion which is disposed on the second direction side with respect to the first flow path member and introduces liquid from outside the liquid ejecting head to the flow path,

the first flow path member has:

a surrounding wall which is provided upright from a surface of the first flow path member on the second direction side toward the second direction and surrounds the liquid introduction portion;

A discharge passage which discharges liquid from the surface to the outside of the first flow path member,

a first opening is provided on the surface, the first opening being part of the discharge channel and opening towards the second direction,

the surrounding wall has a first wall portion arranged along a third direction orthogonal to the first direction,

the minimum distance between the edge of the first opening and the first wall part is less than 1/2 of the length of the largest line segment which can be configured in the first opening,

the boundary line of the surface and the first wall portion divides a portion of the edge of the first opening.

8. The liquid ejecting head as claimed in claim 7, wherein,

all of the plurality of wall portions constituting the surrounding wall are provided upright from the surface toward the second direction.

9. The liquid ejecting head as claimed in claim 8, wherein,

the surrounding wall has a plurality of wall portions including the first wall portion and disposed at different positions in a direction orthogonal to the first direction and the third direction,

the first wall portion is an outermost wall portion of the plurality of wall portions in the direction orthogonal to the first direction and the third direction.

10. The liquid ejecting head as claimed in claim 8, wherein,

a circuit board for driving the liquid ejecting head is provided between the nozzle plate and the first flow path member,

an opening of the discharge passage at an end opposite to the first opening is provided at a position not overlapping the circuit substrate when the first flow path member is viewed in the first direction.

11. The liquid-jet head as claimed in claim 10, wherein,

when the circuit board is viewed along the first direction, the circuit board has a rectangular shape in which the third direction is a long side direction and a direction orthogonal to the first direction and the third direction is a short side direction,

when the first flow channel member is viewed along the first direction, the first flow channel member has an outer shape of a rectangle including the circuit board, and has a rectangle in which the third direction is a long side direction and the direction orthogonal to the first direction and the third direction is a short side direction,

the circuit substrate has a pair of connectors provided at both ends in the third direction,

The opening at the opposite end is disposed outside a range in which the circuit board is located in the direction orthogonal to the first direction and the third direction, and is disposed between the pair of connectors in the third direction when the first flow path member is viewed along the first direction.

12. The liquid ejecting head as claimed in claim 9, wherein,

the liquid ejecting apparatus includes a second flow path member having a supply needle as the liquid introduction portion and inserted into a structure for supplying liquid to the liquid ejecting head.

13. The liquid-jet head as claimed in claim 12, wherein,

the plurality of wall portions have:

a second wall portion that is disposed along the third direction and that is opposed to the first wall portion;

a third wall portion disposed along a direction orthogonal to the first direction and the third direction;

a fourth wall portion that is disposed opposite to the third wall portion and along the direction orthogonal to the first direction and the third direction,

when the first and second flow path members are viewed in the first direction, the minimum distance between the second wall portion and the second flow path member, the minimum distance between the third wall portion and the second flow path member, and the minimum distance between the fourth wall portion and the second flow path member are each 0.7mm or less,

The minimum distance between the edge of the first opening and the second flow path member is 5mm or more.

14. A liquid ejecting apparatus includes:

the liquid ejection head of any one of claims 1 to 13;

and a liquid storage unit that stores liquid supplied to the liquid ejecting head.

15. The liquid ejecting apparatus as claimed in claim 14, wherein,

the liquid ejecting apparatus includes a supply flow path that supplies the liquid in the liquid storage portion to the liquid introduction portion of the liquid ejecting head.

16. The liquid ejecting apparatus as claimed in claim 15, wherein,

the supply flow passage is formed by a hose fitted to the liquid introduction portion.

17. The liquid ejecting apparatus as claimed in claim 14, wherein,

the liquid ejecting apparatus includes a pressure regulating valve provided between the liquid storage portion and the liquid introduction portion and regulating a pressure of liquid supplied to the liquid ejecting head.

18. The liquid ejecting apparatus as claimed in claim 14, wherein,

the liquid storage device is provided with a damper chamber which is provided between the liquid storage portion and the liquid introduction portion and is provided with a flexible film.

19. The liquid ejecting apparatus as claimed in any of claims 14 to 18, wherein,

the liquid ejecting apparatus includes a carriage that holds the liquid ejecting head and moves the liquid ejecting head, and includes a porous member that absorbs liquid discharged from the discharge passage.

20. The liquid ejecting apparatus as claimed in any of claims 14 to 18, wherein,

comprising a carriage which holds the liquid ejecting head and moves the liquid ejecting head,

the discharge passage is a through hole penetrating the first flow path member in the first direction,

on the bottom surface of the carriage, a second opening communicating with the discharge passage is provided.

21. The liquid ejecting apparatus as claimed in claim 20, wherein,

the liquid-absorbing device is provided with a porous member that is disposed on the first direction side with respect to the second opening and absorbs liquid discharged from the second opening.

22. The liquid ejecting apparatus as claimed in claim 20, wherein,

comprises a conveying part for conveying the medium from which the liquid ejected from the nozzle falls,

the second opening is arranged at a position where a trajectory of the medium conveyed by the conveying portion overlaps with the second opening when the liquid ejecting apparatus is viewed in the first direction.

Images